drivers/net/sh_eth.h

/*
 *  SuperH Ethernet device driver
 *
 *  Copyright (C) 2006-2008 Nobuhiro Iwamatsu
 *  Copyright (C) 2008 Renesas Solutions Corp.
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms and conditions of the GNU General Public License,
 *  version 2, as published by the Free Software Foundation.
 *
 *  This program is distributed in the hope it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 *  more details.
 *  You should have received a copy of the GNU General Public License along with
 *  this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 *  The full GNU General Public License is included in this distribution in
 *  the file called "COPYING".
 */

#ifndef __SH_ETH_H__
#define __SH_ETH_H__

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/netdevice.h>
#include <linux/phy.h>

#define CARDNAME	"sh-eth"
#define TX_TIMEOUT	(5*HZ)
#define TX_RING_SIZE	64	/* Tx ring size */
#define RX_RING_SIZE	64	/* Rx ring size */
#define ETHERSMALL		60
#define PKT_BUF_SZ		1538

#ifdef CONFIG_CPU_SUBTYPE_SH7763

#define SH7763_SKB_ALIGN 32
/* Chip Base Address */
# define SH_TSU_ADDR  0xFFE01800
# define ARSTR 		  0xFFE01800

/* Chip Registers */
/* E-DMAC */
# define EDSR    0x000
# define EDMR    0x400
# define EDTRR   0x408
# define EDRRR   0x410
# define EESR    0x428
# define EESIPR  0x430
# define TDLAR   0x010
# define TDFAR   0x014
# define TDFXR   0x018
# define TDFFR   0x01C
# define RDLAR   0x030
# define RDFAR   0x034
# define RDFXR   0x038
# define RDFFR   0x03C
# define TRSCER  0x438
# define RMFCR   0x440
# define TFTR    0x448
# define FDR     0x450
# define RMCR    0x458
# define RPADIR  0x460
# define FCFTR   0x468

/* Ether Register */
# define ECMR    0x500
# define ECSR    0x510
# define ECSIPR  0x518
# define PIR     0x520
# define PSR     0x528
# define PIPR    0x52C
# define RFLR    0x508
# define APR     0x554
# define MPR     0x558
# define PFTCR	 0x55C
# define PFRCR	 0x560
# define TPAUSER 0x564
# define GECMR   0x5B0
# define BCULR   0x5B4
# define MAHR    0x5C0
# define MALR    0x5C8
# define TROCR   0x700
# define CDCR    0x708
# define LCCR    0x710
# define CEFCR   0x740
# define FRECR   0x748
# define TSFRCR  0x750
# define TLFRCR  0x758
# define RFCR    0x760
# define CERCR   0x768
# define CEECR   0x770
# define MAFCR   0x778

/* TSU Absolute Address */
# define TSU_CTRST       0x004
# define TSU_FWEN0       0x010
# define TSU_FWEN1       0x014
# define TSU_FCM         0x18
# define TSU_BSYSL0      0x20
# define TSU_BSYSL1      0x24
# define TSU_PRISL0      0x28
# define TSU_PRISL1      0x2C
# define TSU_FWSL0       0x30
# define TSU_FWSL1       0x34
# define TSU_FWSLC       0x38
# define TSU_QTAG0       0x40
# define TSU_QTAG1       0x44
# define TSU_FWSR        0x50
# define TSU_FWINMK      0x54
# define TSU_ADQT0       0x48
# define TSU_ADQT1       0x4C
# define TSU_VTAG0       0x58
# define TSU_VTAG1       0x5C
# define TSU_ADSBSY      0x60
# define TSU_TEN         0x64
# define TSU_POST1       0x70
# define TSU_POST2       0x74
# define TSU_POST3       0x78
# define TSU_POST4       0x7C
# define TSU_ADRH0       0x100
# define TSU_ADRL0       0x104
# define TSU_ADRH31      0x1F8
# define TSU_ADRL31      0x1FC

# define TXNLCR0         0x80
# define TXALCR0         0x84
# define RXNLCR0         0x88
# define RXALCR0         0x8C
# define FWNLCR0         0x90
# define FWALCR0         0x94
# define TXNLCR1         0xA0
# define TXALCR1         0xA4
# define RXNLCR1         0xA8
# define RXALCR1         0xAC
# define FWNLCR1         0xB0
# define FWALCR1         0x40

#else /* CONFIG_CPU_SUBTYPE_SH7763 */
# define RX_OFFSET 2	/* skb offset */
/* Chip base address */
# define SH_TSU_ADDR  0xA7000804
# define ARSTR		  0xA7000800

/* Chip Registers */
/* E-DMAC */
# define EDMR	0x0000
# define EDTRR	0x0004
# define EDRRR	0x0008
# define TDLAR	0x000C
# define RDLAR	0x0010
# define EESR	0x0014
# define EESIPR	0x0018
# define TRSCER	0x001C
# define RMFCR	0x0020
# define TFTR	0x0024
# define FDR	0x0028
# define RMCR	0x002C
# define EDOCR	0x0030
# define FCFTR	0x0034
# define RPADIR	0x0038
# define TRIMD	0x003C
# define RBWAR	0x0040
# define RDFAR	0x0044
# define TBRAR	0x004C
# define TDFAR	0x0050

/* Ether Register */
# define ECMR	0x0160
# define ECSR	0x0164
# define ECSIPR	0x0168
# define PIR	0x016C
# define MAHR	0x0170
# define MALR	0x0174
# define RFLR	0x0178
# define PSR	0x017C
# define TROCR	0x0180
# define CDCR	0x0184
# define LCCR	0x0188
# define CNDCR	0x018C
# define CEFCR	0x0194
# define FRECR	0x0198
# define TSFRCR	0x019C
# define TLFRCR	0x01A0
# define RFCR	0x01A4
# define MAFCR	0x01A8
# define IPGR	0x01B4
# if defined(CONFIG_CPU_SUBTYPE_SH7710)
# define APR	0x01B8
# define MPR 	0x01BC
# define TPAUSER 0x1C4
# define BCFR	0x1CC
# endif /* CONFIG_CPU_SH7710 */

/* TSU */
# define TSU_CTRST	0x004
# define TSU_FWEN0	0x010
# define TSU_FWEN1	0x014
# define TSU_FCM	0x018
# define TSU_BSYSL0	0x020
# define TSU_BSYSL1	0x024
# define TSU_PRISL0	0x028
# define TSU_PRISL1	0x02C
# define TSU_FWSL0	0x030
# define TSU_FWSL1	0x034
# define TSU_FWSLC	0x038
# define TSU_QTAGM0	0x040
# define TSU_QTAGM1	0x044
# define TSU_ADQT0 	0x048
# define TSU_ADQT1	0x04C
# define TSU_FWSR	0x050
# define TSU_FWINMK	0x054
# define TSU_ADSBSY	0x060
# define TSU_TEN	0x064
# define TSU_POST1	0x070
# define TSU_POST2	0x074
# define TSU_POST3	0x078
# define TSU_POST4	0x07C
# define TXNLCR0	0x080
# define TXALCR0	0x084
# define RXNLCR0	0x088
# define RXALCR0	0x08C
# define FWNLCR0	0x090
# define FWALCR0	0x094
# define TXNLCR1	0x0A0
# define TXALCR1	0x0A4
# define RXNLCR1	0x0A8
# define RXALCR1	0x0AC
# define FWNLCR1	0x0B0
# define FWALCR1	0x0B4

#define TSU_ADRH0	0x0100
#define TSU_ADRL0	0x0104
#define TSU_ADRL31	0x01FC

#endif /* CONFIG_CPU_SUBTYPE_SH7763 */

/*
 * Register's bits
 */
#ifdef CONFIG_CPU_SUBTYPE_SH7763
/* EDSR */
enum EDSR_BIT {
	EDSR_ENT = 0x01, EDSR_ENR = 0x02,
};
#define EDSR_ENALL (EDSR_ENT|EDSR_ENR)

/* GECMR */
enum GECMR_BIT {
	GECMR_10 = 0x0, GECMR_100 = 0x04, GECMR_1000 = 0x01,
};
#endif

/* EDMR */
enum DMAC_M_BIT {
	EDMR_DL1 = 0x20, EDMR_DL0 = 0x10,
#ifdef CONFIG_CPU_SUBTYPE_SH7763
	EDMR_SRST	= 0x03,
	EMDR_DESC_R	= 0x30, /* Descriptor reserve size */
	EDMR_EL		= 0x40, /* Litte endian */
#else /* CONFIG_CPU_SUBTYPE_SH7763 */
	EDMR_SRST = 0x01,
#endif
};

/* EDTRR */
enum DMAC_T_BIT {
#ifdef CONFIG_CPU_SUBTYPE_SH7763
	EDTRR_TRNS = 0x03,
#else
	EDTRR_TRNS = 0x01,
#endif
};

/* EDRRR*/
enum EDRRR_R_BIT {
	EDRRR_R = 0x01,
};

/* TPAUSER */
enum TPAUSER_BIT {
	TPAUSER_TPAUSE = 0x0000ffff,
	TPAUSER_UNLIMITED = 0,
};

/* BCFR */
enum BCFR_BIT {
	BCFR_RPAUSE = 0x0000ffff,
	BCFR_UNLIMITED = 0,
};

/* PIR */
enum PIR_BIT {
	PIR_MDI = 0x08, PIR_MDO = 0x04, PIR_MMD = 0x02, PIR_MDC = 0x01,
};

/* PSR */
enum PHY_STATUS_BIT { PHY_ST_LINK = 0x01, };

/* EESR */
enum EESR_BIT {
#ifndef CONFIG_CPU_SUBTYPE_SH7763
	EESR_TWB  = 0x40000000,
#else
	EESR_TWB  = 0xC0000000,
	EESR_TC1  = 0x20000000,
	EESR_TUC  = 0x10000000,
	EESR_ROC  = 0x80000000,
#endif
	EESR_TABT = 0x04000000,
	EESR_RABT = 0x02000000, EESR_RFRMER = 0x01000000,
#ifndef CONFIG_CPU_SUBTYPE_SH7763
	EESR_ADE  = 0x00800000,
#endif
	EESR_ECI  = 0x00400000,
	EESR_FTC  = 0x00200000, EESR_TDE  = 0x00100000,
	EESR_TFE  = 0x00080000, EESR_FRC  = 0x00040000,
	EESR_RDE  = 0x00020000, EESR_RFE  = 0x00010000,
#ifndef CONFIG_CPU_SUBTYPE_SH7763
	EESR_CND  = 0x00000800,
#endif
	EESR_DLC  = 0x00000400,
	EESR_CD   = 0x00000200, EESR_RTO  = 0x00000100,
	EESR_RMAF = 0x00000080, EESR_CEEF = 0x00000040,
	EESR_CELF = 0x00000020, EESR_RRF  = 0x00000010,
	EESR_RTLF = 0x00000008, EESR_RTSF = 0x00000004,
	EESR_PRE  = 0x00000002, EESR_CERF = 0x00000001,
};


#ifdef CONFIG_CPU_SUBTYPE_SH7763
# define TX_CHECK (EESR_TC1 | EESR_FTC)
# define EESR_ERR_CHECK	(EESR_TWB | EESR_TABT | EESR_RABT | EESR_RDE \
		| EESR_RFRMER | EESR_TFE | EESR_TDE | EESR_ECI)
# define TX_ERROR_CEHCK (EESR_TWB | EESR_TABT | EESR_TDE | EESR_TFE)

#else
# define TX_CHECK (EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO)
# define EESR_ERR_CHECK	(EESR_TWB | EESR_TABT | EESR_RABT | EESR_RDE \
		| EESR_RFRMER | EESR_ADE | EESR_TFE | EESR_TDE | EESR_ECI)
# define TX_ERROR_CEHCK (EESR_TWB | EESR_TABT | EESR_ADE | EESR_TDE | EESR_TFE)
#endif

/* EESIPR */
enum DMAC_IM_BIT {
	DMAC_M_TWB = 0x40000000, DMAC_M_TABT = 0x04000000,
	DMAC_M_RABT = 0x02000000,
	DMAC_M_RFRMER = 0x01000000, DMAC_M_ADF = 0x00800000,
	DMAC_M_ECI = 0x00400000, DMAC_M_FTC = 0x00200000,
	DMAC_M_TDE = 0x00100000, DMAC_M_TFE = 0x00080000,
	DMAC_M_FRC = 0x00040000, DMAC_M_RDE = 0x00020000,
	DMAC_M_RFE = 0x00010000, DMAC_M_TINT4 = 0x00000800,
	DMAC_M_TINT3 = 0x00000400, DMAC_M_TINT2 = 0x00000200,
	DMAC_M_TINT1 = 0x00000100, DMAC_M_RINT8 = 0x00000080,
	DMAC_M_RINT5 = 0x00000010, DMAC_M_RINT4 = 0x00000008,
	DMAC_M_RINT3 = 0x00000004, DMAC_M_RINT2 = 0x00000002,
	DMAC_M_RINT1 = 0x00000001,
};

/* Receive descriptor bit */
enum RD_STS_BIT {
	RD_RACT = 0x80000000, RD_RDEL = 0x40000000,
	RD_RFP1 = 0x20000000, RD_RFP0 = 0x10000000,
	RD_RFE = 0x08000000, RD_RFS10 = 0x00000200,
	RD_RFS9 = 0x00000100, RD_RFS8 = 0x00000080,
	RD_RFS7 = 0x00000040, RD_RFS6 = 0x00000020,
	RD_RFS5 = 0x00000010, RD_RFS4 = 0x00000008,
	RD_RFS3 = 0x00000004, RD_RFS2 = 0x00000002,
	RD_RFS1 = 0x00000001,
};
#define RDF1ST	RD_RFP1
#define RDFEND	RD_RFP0
#define RD_RFP	(RD_RFP1|RD_RFP0)

/* FCFTR */
enum FCFTR_BIT {
	FCFTR_RFF2 = 0x00040000, FCFTR_RFF1 = 0x00020000,
	FCFTR_RFF0 = 0x00010000, FCFTR_RFD2 = 0x00000004,
	FCFTR_RFD1 = 0x00000002, FCFTR_RFD0 = 0x00000001,
};
#define FIFO_F_D_RFF	(FCFTR_RFF2|FCFTR_RFF1|FCFTR_RFF0)
#define FIFO_F_D_RFD	(FCFTR_RFD2|FCFTR_RFD1|FCFTR_RFD0)

/* Transfer descriptor bit */
enum TD_STS_BIT {
	TD_TACT = 0x80000000,
	TD_TDLE = 0x40000000, TD_TFP1 = 0x20000000,
	TD_TFP0 = 0x10000000,
};
#define TDF1ST	TD_TFP1
#define TDFEND	TD_TFP0
#define TD_TFP	(TD_TFP1|TD_TFP0)

/* RMCR */
enum RECV_RST_BIT { RMCR_RST = 0x01, };
/* ECMR */
enum FELIC_MODE_BIT {
#ifdef CONFIG_CPU_SUBTYPE_SH7763
	ECMR_TRCCM = 0x04000000, ECMR_RCSC = 0x00800000,
	ECMR_DPAD = 0x00200000, ECMR_RZPF = 0x00100000,
#endif
	ECMR_ZPF = 0x00080000, ECMR_PFR = 0x00040000, ECMR_RXF = 0x00020000,
	ECMR_TXF = 0x00010000, ECMR_MCT = 0x00002000, ECMR_PRCEF = 0x00001000,
	ECMR_PMDE = 0x00000200, ECMR_RE = 0x00000040, ECMR_TE = 0x00000020,
	ECMR_ILB = 0x00000008, ECMR_ELB = 0x00000004, ECMR_DM = 0x00000002,
	ECMR_PRM = 0x00000001,
};

#ifdef CONFIG_CPU_SUBTYPE_SH7763
#define ECMR_CHG_DM	(ECMR_TRCCM | ECMR_RZPF | ECMR_ZPF |\
			ECMR_PFR | ECMR_RXF | ECMR_TXF | ECMR_MCT)
#else
#define ECMR_CHG_DM	(ECMR_ZPF | ECMR_PFR ECMR_RXF | ECMR_TXF | ECMR_MCT)
#endif

/* ECSR */
enum ECSR_STATUS_BIT {
#ifndef CONFIG_CPU_SUBTYPE_SH7763
	ECSR_BRCRX = 0x20, ECSR_PSRTO = 0x10,
#endif
	ECSR_LCHNG = 0x04,
	ECSR_MPD = 0x02, ECSR_ICD = 0x01,
};

#ifdef CONFIG_CPU_SUBTYPE_SH7763
# define ECSR_INIT (ECSR_ICD | ECSIPR_MPDIP)
#else
# define ECSR_INIT (ECSR_BRCRX | ECSR_PSRTO | \
			ECSR_LCHNG | ECSR_ICD | ECSIPR_MPDIP)
#endif

/* ECSIPR */
enum ECSIPR_STATUS_MASK_BIT {
#ifndef CONFIG_CPU_SUBTYPE_SH7763
	ECSIPR_BRCRXIP = 0x20, ECSIPR_PSRTOIP = 0x10,
#endif
	ECSIPR_LCHNGIP = 0x04,
	ECSIPR_MPDIP = 0x02, ECSIPR_ICDIP = 0x01,
};

#ifdef CONFIG_CPU_SUBTYPE_SH7763
# define ECSIPR_INIT (ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP)
#else
# define ECSIPR_INIT (ECSIPR_BRCRXIP | ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | \
				ECSIPR_ICDIP | ECSIPR_MPDIP)
#endif

/* APR */
enum APR_BIT {
	APR_AP = 0x00000001,
};

/* MPR */
enum MPR_BIT {
	MPR_MP = 0x00000001,
};

/* TRSCER */
enum DESC_I_BIT {
	DESC_I_TINT4 = 0x0800, DESC_I_TINT3 = 0x0400, DESC_I_TINT2 = 0x0200,
	DESC_I_TINT1 = 0x0100, DESC_I_RINT8 = 0x0080, DESC_I_RINT5 = 0x0010,
	DESC_I_RINT4 = 0x0008, DESC_I_RINT3 = 0x0004, DESC_I_RINT2 = 0x0002,
	DESC_I_RINT1 = 0x0001,
};

/* RPADIR */
enum RPADIR_BIT {
	RPADIR_PADS1 = 0x20000, RPADIR_PADS0 = 0x10000,
	RPADIR_PADR = 0x0003f,
};

#if defined(CONFIG_CPU_SUBTYPE_SH7763)
# define RPADIR_INIT (0x00)
#else
# define RPADIR_INIT (RPADIR_PADS1)
#endif

/* RFLR */
#define RFLR_VALUE 0x1000

/* FDR */
enum FIFO_SIZE_BIT {
	FIFO_SIZE_T = 0x00000700, FIFO_SIZE_R = 0x00000007,
};
enum phy_offsets {
	PHY_CTRL = 0, PHY_STAT = 1, PHY_IDT1 = 2, PHY_IDT2 = 3,
	PHY_ANA = 4, PHY_ANL = 5, PHY_ANE = 6,
	PHY_16 = 16,
};

/* PHY_CTRL */
enum PHY_CTRL_BIT {
	PHY_C_RESET = 0x8000, PHY_C_LOOPBK = 0x4000, PHY_C_SPEEDSL = 0x2000,
	PHY_C_ANEGEN = 0x1000, PHY_C_PWRDN = 0x0800, PHY_C_ISO = 0x0400,
	PHY_C_RANEG = 0x0200, PHY_C_DUPLEX = 0x0100, PHY_C_COLT = 0x0080,
};
#define DM9161_PHY_C_ANEGEN 0	/* auto nego special */

/* PHY_STAT */
enum PHY_STAT_BIT {
	PHY_S_100T4 = 0x8000, PHY_S_100X_F = 0x4000, PHY_S_100X_H = 0x2000,
	PHY_S_10T_F = 0x1000, PHY_S_10T_H = 0x0800, PHY_S_ANEGC = 0x0020,
	PHY_S_RFAULT = 0x0010, PHY_S_ANEGA = 0x0008, PHY_S_LINK = 0x0004,
	PHY_S_JAB = 0x0002, PHY_S_EXTD = 0x0001,
};

/* PHY_ANA */
enum PHY_ANA_BIT {
	PHY_A_NP = 0x8000, PHY_A_ACK = 0x4000, PHY_A_RF = 0x2000,
	PHY_A_FCS = 0x0400, PHY_A_T4 = 0x0200, PHY_A_FDX = 0x0100,
	PHY_A_HDX = 0x0080, PHY_A_10FDX = 0x0040, PHY_A_10HDX = 0x0020,
	PHY_A_SEL = 0x001e,
};
/* PHY_ANL */
enum PHY_ANL_BIT {
	PHY_L_NP = 0x8000, PHY_L_ACK = 0x4000, PHY_L_RF = 0x2000,
	PHY_L_FCS = 0x0400, PHY_L_T4 = 0x0200, PHY_L_FDX = 0x0100,
	PHY_L_HDX = 0x0080, PHY_L_10FDX = 0x0040, PHY_L_10HDX = 0x0020,
	PHY_L_SEL = 0x001f,
};

/* PHY_ANE */
enum PHY_ANE_BIT {
	PHY_E_PDF = 0x0010, PHY_E_LPNPA = 0x0008, PHY_E_NPA = 0x0004,
	PHY_E_PRX = 0x0002, PHY_E_LPANEGA = 0x0001,
};

/* DM9161 */
enum PHY_16_BIT {
	PHY_16_BP4B45 = 0x8000, PHY_16_BPSCR = 0x4000, PHY_16_BPALIGN = 0x2000,
	PHY_16_BP_ADPOK = 0x1000, PHY_16_Repeatmode = 0x0800,
	PHY_16_TXselect = 0x0400,
	PHY_16_Rsvd = 0x0200, PHY_16_RMIIEnable = 0x0100,
	PHY_16_Force100LNK = 0x0080,
	PHY_16_APDLED_CTL = 0x0040, PHY_16_COLLED_CTL = 0x0020,
	PHY_16_RPDCTR_EN = 0x0010,
	PHY_16_ResetStMch = 0x0008, PHY_16_PreamSupr = 0x0004,
	PHY_16_Sleepmode = 0x0002,
	PHY_16_RemoteLoopOut = 0x0001,
};

#define POST_RX		0x08
#define POST_FW		0x04
#define POST0_RX	(POST_RX)
#define POST0_FW	(POST_FW)
#define POST1_RX	(POST_RX >> 2)
#define POST1_FW	(POST_FW >> 2)
#define POST_ALL	(POST0_RX | POST0_FW | POST1_RX | POST1_FW)

/* ARSTR */
enum ARSTR_BIT { ARSTR_ARSTR = 0x00000001, };

/* TSU_FWEN0 */
enum TSU_FWEN0_BIT {
	TSU_FWEN0_0 = 0x00000001,
};

/* TSU_ADSBSY */
enum TSU_ADSBSY_BIT {
	TSU_ADSBSY_0 = 0x00000001,
};

/* TSU_TEN */
enum TSU_TEN_BIT {
	TSU_TEN_0 = 0x80000000,
};

/* TSU_FWSL0 */
enum TSU_FWSL0_BIT {
	TSU_FWSL0_FW50 = 0x1000, TSU_FWSL0_FW40 = 0x0800,
	TSU_FWSL0_FW30 = 0x0400, TSU_FWSL0_FW20 = 0x0200,
	TSU_FWSL0_FW10 = 0x0100, TSU_FWSL0_RMSA0 = 0x0010,
};

/* TSU_FWSLC */
enum TSU_FWSLC_BIT {
	TSU_FWSLC_POSTENU = 0x2000, TSU_FWSLC_POSTENL = 0x1000,
	TSU_FWSLC_CAMSEL03 = 0x0080, TSU_FWSLC_CAMSEL02 = 0x0040,
	TSU_FWSLC_CAMSEL01 = 0x0020, TSU_FWSLC_CAMSEL00 = 0x0010,
	TSU_FWSLC_CAMSEL13 = 0x0008, TSU_FWSLC_CAMSEL12 = 0x0004,
	TSU_FWSLC_CAMSEL11 = 0x0002, TSU_FWSLC_CAMSEL10 = 0x0001,
};

/*
 * The sh ether Tx buffer descriptors.
 * This structure should be 20 bytes.
 */
struct sh_eth_txdesc {
	u32 status;		/* TD0 */
#if defined(CONFIG_CPU_LITTLE_ENDIAN)
	u16 pad0;		/* TD1 */
	u16 buffer_length;	/* TD1 */
#else
	u16 buffer_length;	/* TD1 */
	u16 pad0;		/* TD1 */
#endif
	u32 addr;		/* TD2 */
	u32 pad1;		/* padding data */
};

/*
 * The sh ether Rx buffer descriptors.
 * This structure should be 20 bytes.
 */
struct sh_eth_rxdesc {
	u32 status;		/* RD0 */
#if defined(CONFIG_CPU_LITTLE_ENDIAN)
	u16 frame_length;	/* RD1 */
	u16 buffer_length;	/* RD1 */
#else
	u16 buffer_length;	/* RD1 */
	u16 frame_length;	/* RD1 */
#endif
	u32 addr;		/* RD2 */
	u32 pad0;		/* padding data */
};

struct sh_eth_private {
	dma_addr_t rx_desc_dma;
	dma_addr_t tx_desc_dma;
	struct sh_eth_rxdesc *rx_ring;
	struct sh_eth_txdesc *tx_ring;
	struct sk_buff **rx_skbuff;
	struct sk_buff **tx_skbuff;
	struct net_device_stats stats;
	struct timer_list timer;
	spinlock_t lock;
	u32 cur_rx, dirty_rx;	/* Producer/consumer ring indices */
	u32 cur_tx, dirty_tx;
	u32 rx_buf_sz;		/* Based on MTU+slack. */
	/* MII transceiver section. */
	u32 phy_id;					/* PHY ID */
	struct mii_bus *mii_bus;	/* MDIO bus control */
	struct phy_device *phydev;	/* PHY device control */
	enum phy_state link;
	int msg_enable;
	int speed;
	int duplex;
	u32 rx_int_var, tx_int_var;	/* interrupt control variables */
	char post_rx;		/* POST receive */
	char post_fw;		/* POST forward */
	struct net_device_stats tsu_stats;	/* TSU forward status */
};

#ifdef CONFIG_CPU_SUBTYPE_SH7763
/* SH7763 has endian control register */
#define swaps(x, y)
#else
static void swaps(char *src, int len)
{
#ifdef __LITTLE_ENDIAN__
	u32 *p = (u32 *)src;
	u32 *maxp;
	maxp = p + ((len + sizeof(u32) - 1) / sizeof(u32));

	for (; p < maxp; p++)
		*p = swab32(*p);
#endif
}
#endif /* CONFIG_CPU_SUBTYPE_SH7763 */
#endif